It happened at the Wild Lime Bar & Kitchen in Bridge Street at about 7.40pm on Saturday, May 3.

Pc Scott Hughes, who is investigating said: “I am very keen to speak to the man shown in the CCTV.

“He is white, aged in his mid to late 20s, about 5ft 10ins and of medium build. He has a shaved head, no facial hair and was wearing a grey top and blue jeans. He has a large tattoo on his right forearm.”

Pc Hughes encouraged anyone who recognised the suspect in the CCTV image to get in touch. He said: “Do you recognise this man? Were you in the Wild Lime pub on this Saturday and did you see an assault? “If you have any information I would urge you to contact police immediately.”